GitLab

* Add Kademlia async lookup implementation (replaces prior implementation)
* Add lookup events that allow full lookup reconstruction from logs
* Introduce lookup stopping condition, based on parameter "beta"
Co-authored-by: Adin Schmahmann <adin.schmahmann@gmail.com>

Allows specifying peer filter functions on query and on adding peers to the routing table. This patch also includes some reasonable default functions for a public-only and private-only DHT.
Co-authored-by: Will Scott <will@cypherpunk.email>
Co-authored-by: Steven Allen <steven@stebalien.com>

fix(test): TestFindPeerQuery and TestFindPeerQueryMinimal now refresh DHT routing tables before running. TestFindPeerQuery no longer runs with the race detector because it uses too many goroutines.

* feat: consume identify events to evaluate routing table addition
* fix: routing table no longer gets an update just because new messages have arrived or been sent
* fix: add already connected peers into the routing table before listening to events
Co-authored-by: Raúl Kripalani <raul.kripalani@gmail.com>
Co-authored-by: Aarsh Shah <aarshkshah1992@gmail.com>

go 1.14 is now required anyways

Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.5.2 to 0.6.1.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.5.2...v0.6.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/multiformats/go-multiaddr](https://github.com/multiformats/go-multiaddr) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/multiformats/go-multiaddr/releases)
- [Commits](https://github.com/multiformats/go-multiaddr/compare/v0.2.0...v0.2.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/libp2p/go-libp2p-core](https://github.com/libp2p/go-libp2p-core) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/libp2p/go-libp2p-core/releases)
- [Commits](https://github.com/libp2p/go-libp2p-core/compare/v0.3.0...v0.3.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.4.0 to 1.5.1.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.4.0...v1.5.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-datastore](https://github.com/ipfs/go-datastore) from 0.4.2 to 0.4.4.
- [Release notes](https://github.com/ipfs/go-datastore/releases)
- [Commits](https://github.com/ipfs/go-datastore/compare/v0.4.2...v0.4.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-datastore](https://github.com/ipfs/go-datastore) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/ipfs/go-datastore/releases)
- [Commits](https://github.com/ipfs/go-datastore/compare/v0.4.1...v0.4.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.5.1 to 0.5.2.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.5.1...v0.5.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/hashicorp/golang-lru](https://github.com/hashicorp/golang-lru) from 0.5.3 to 0.5.4.
- [Release notes](https://github.com/hashicorp/golang-lru/releases)
- [Commits](https://github.com/hashicorp/golang-lru/compare/v0.5.3...v0.5.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-datastore](https://github.com/ipfs/go-datastore) from 0.3.1 to 0.4.1.
- [Release notes](https://github.com/ipfs/go-datastore/releases)
- [Commits](https://github.com/ipfs/go-datastore/compare/v0.3.1...v0.4.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-cid](https://github.com/ipfs/go-cid) from 0.0.4 to 0.0.5.
- [Release notes](https://github.com/ipfs/go-cid/releases)
- [Commits](https://github.com/ipfs/go-cid/compare/v0.0.4...v0.0.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/multiformats/go-multistream](https://github.com/multiformats/go-multistream) from 0.1.0 to 0.1.1.
- [Release notes](https://github.com/multiformats/go-multistream/releases)
- [Commits](https://github.com/multiformats/go-multistream/compare/v0.1.0...v0.1.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [go.opencensus.io](https://github.com/census-instrumentation/opencensus-go) from 0.22.2 to 0.22.3.
- [Release notes](https://github.com/census-instrumentation/opencensus-go/releases)
- [Commits](https://github.com/census-instrumentation/opencensus-go/compare/v0.22.2...v0.22.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/multiformats/go-multihash](https://github.com/multiformats/go-multihash) from 0.0.10 to 0.0.13.
- [Release notes](https://github.com/multiformats/go-multihash/releases)
- [Commits](https://github.com/multiformats/go-multihash/compare/v0.0.10...v0.0.13)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.5.0 to 0.5.1.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.5.0...v0.5.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.4.2 to 0.5.0.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.4.2...v0.5.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/libp2p/go-libp2p-core](https://github.com/libp2p/go-libp2p-core) from 0.2.5 to 0.3.0.
- [Release notes](https://github.com/libp2p/go-libp2p-core/releases)
- [Commits](https://github.com/libp2p/go-libp2p-core/compare/v0.2.5...v0.3.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-cid](https://github.com/ipfs/go-cid) from 0.0.3 to 0.0.4.
- [Release notes](https://github.com/ipfs/go-cid/releases)
- [Commits](https://github.com/ipfs/go-cid/compare/v0.0.3...v0.0.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Fixes a bug where we wouldn't be able to perform queries with a sparse but
non-empty routing table.

Bumps [github.com/multiformats/go-multiaddr](https://github.com/multiformats/go-multiaddr) from 0.1.2 to 0.2.0.
- [Release notes](https://github.com/multiformats/go-multiaddr/releases)
- [Commits](https://github.com/multiformats/go-multiaddr/compare/v0.1.2...v0.2.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

We'd like to be able to refresh then _wait_ for the refresh to finish in the testground DHT tests. That way, we can:

1. Start and disable _auto_ refresh.
2. Bootstrap.
3. Refresh a couple of times till we're stable.
4. Wait to _stop_ refreshing.
5. Disconnect from and forget about all peers _not_ in our routing tables.
6. Run the actual tests without interference from the bootstrapping logic.

Bumps [go.opencensus.io](https://github.com/census-instrumentation/opencensus-go) from 0.22.1 to 0.22.2.
- [Release notes](https://github.com/census-instrumentation/opencensus-go/releases)
- [Commits](https://github.com/census-instrumentation/opencensus-go/compare/v0.22.1...v0.22.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-datastore](https://github.com/ipfs/go-datastore) from 0.1.1 to 0.3.1.
- [Release notes](https://github.com/ipfs/go-datastore/releases)
- [Commits](https://github.com/ipfs/go-datastore/compare/v0.1.1...v0.3.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/mr-tron/base58](https://github.com/mr-tron/base58) from 1.1.2 to 1.1.3.
- [Release notes](https://github.com/mr-tron/base58/releases)
- [Commits](https://github.com/mr-tron/base58/compare/v1.1.2...v1.1.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.3.0...v1.4.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Update deps:

* Switch to multiformats/go-base32
* Regenerate protobuf decoding code